Important Notice: Our web hosting provider recently started charging us for additional visits, which was unexpected. In response, we're seeking donations. Depending on the situation, we may explore different monetization options for our Community and Expert Contributors. It's crucial to provide more returns for their expertise and offer more Expert Validated Answers or AI Validated Answers. Learn more about our hosting issue here.
The important number is the effective working radius of the pinion. The rack has the same velocity as the pinion circumference at this radius where they mesh together. So, if I remember back to thirty years ago correctly, the rack velocity is the angular velocity (in radians) of the pinion times the effective radius.
